Abstract
The building stock in Eastern European countries varies greatly in terms of the thermal properties of the materials used. During
recent decades, the requirements related to building energy performance have been changed. Nevertheless, the number of newly
built buildings has decreased in recent years, so there are few buildings that fulfill the strictest requirements that were recently
introduced. Several national programs have been started to help owners improve the energy use of their buildings. In this paper,
the various requirements of the past several decades were presented, and the energy analysis of different typical buildings (family
house, multi-family house, block of flats, public house) was performed. The possibility of PV cells installation was also analyzed.